Casio has released its latest fitness-oriented digital watches, the G-Shock G-Lide GBX-H5600 series, in the US market. Following an initial launch in Japan earlier this spring, the new models are now available for $330. The GBX-H5600 integrates modern health tracking hardware, including an optical heart rate monitor, into the familiar square G-Shock profile, specifically targeting surfers and outdoor users.

Design Details
The lineup debuts with two models: the black GBX-H5600-1 and the blue GBX-H5600-2. Both feature a translucent bezel and a solid band made from bio-based resin. Casio has managed to reduce the weight of these watches to 47 grams, making them roughly 12 grams lighter than the older DW-H5600 models. This weight reduction is primarily due to a new case back constructed from carbon fiber-reinforced resin.
For the display, Casio is using a high-resolution Memory-in-Pixel (MIP) LCD. MIP panels are standard for outdoor sports watches because they remain highly legible in direct sunlight, which is a necessary practical feature for a device intended for the beach.
Internally, the GBX-H5600 functions as a standard fitness tracker. It includes an optical sensor for heart rate monitoring and blood oxygen level estimates, along with a three-axis accelerometer to track steps, distance, and pace. The software supports multi-sport tracking, sleep analysis, and cardio load measurements.

Because this watch is part of the surf-focused G-Lide series, it also includes tide graphs, moon phase data, and sunrise/sunset times. The watch can be connected to the smartphone app via Bluetooth to load location-specific tide patterns from a database of about 3,300 global surf spots directly to the device.
As a connected watch, it handles basic smart functions. It mirrors smartphone notifications for calls, emails, and social media, and includes a phone finder feature alongside automatic time adjustment.

Power management relies on a hybrid system of USB and solar-assisted charging. If you leave the heart rate monitor running continuously during activities, the battery lasts a maximum of 35 hours. If you turn off the heart rate tracking and use it as a standard digital watch, a single charge lasts about a month. The power-saving mode extends that standby time to roughly 11 months.
In related news, Casio has recently brought its Japanese red lantern-inspired Aka-Chochin G-Shock watches to the US, while also unveiling a new translucent G-Shock model influenced by 1990s streetwear culture.
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